iOS 10.3 (build 14E5269a) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2017-03-08T17:59:58Z. The update package is 415.2 MB. This is a delta (partial) update that requires 10.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cdc56bcc5984b76f16b77d6f3270c1ddad662d75.zip.